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-rw-r--r--libbacktrace/GetPss.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/libbacktrace/GetPss.cpp b/libbacktrace/GetPss.cpp
index b4dc48d56..6d750ea81 100644
--- a/libbacktrace/GetPss.cpp
+++ b/libbacktrace/GetPss.cpp
@@ -24,7 +24,7 @@
// This is an extremely simplified version of libpagemap.
-#define _BITS(x, offset, bits) (((x) >> offset) & ((1LL << (bits)) - 1))
+#define _BITS(x, offset, bits) (((x) >> (offset)) & ((1LL << (bits)) - 1))
#define PAGEMAP_PRESENT(x) (_BITS(x, 63, 1))
#define PAGEMAP_SWAPPED(x) (_BITS(x, 62, 1))